气候变化领域集成服务门户(CCPortal): Effects of Subgrid Terrain Radiative Forcing on the Ability of RegCM4.1 in the Simulation of Summer Precipitation Over China

CCPortal

DOI	10.1029/2019JD032215
	Effects of Subgrid Terrain Radiative Forcing on the Ability of RegCM4.1 in the Simulation of Summer Precipitation Over China
	Gu C.; Huang A.; Wu Y.; Yang B.; Mu X.; Zhang X.; Cai S.
发表日期	2020
ISSN	2169897X
卷号	125 期号:12
英文摘要	We implemented a subgrid terrain radiative forcing (STRF) scheme into the International Centre for Theoretical Physics, Italy, Regional Climate Model Version 4.1 (RegCM4.1) and evaluated its impacts on the summer precipitation simulation over China by comparing the model results from the experiments with and without the STRF scheme. The RegCM4.1 without the STRF scheme simulates strong East Asian summer monsoon and overestimates the summer precipitation over China. Adopting the STRF scheme in the RegCM4.1 improves the representation of surface radiation process over complex terrains, by reducing the net gain of the surface radiation energy over the Tibetan Plateau (TP). As a result, the heat released from the surface to the overlying air column decreases, thus suppressing the development of local convection over the TP. In addition, the weakened TP thermal forcing due to the STRF effect reduces the land-sea thermal contrast, resulting in a weakened East Asian summer monsoon that produces less transport of water vapor from tropical oceans and hence weakens summer precipitation over China. Our analysis indicates that such improvement in the precipitation simulation induced by the STRF effect is mainly due to the improved simulation of precipitation intensity, particularly that associated with the moderate and heavy precipitation events, and convective processes. ©2020. The Authors.
英文关键词	China; East Asian summer monsoon; subgrid terrain radiative forcing scheme; summer precipitation; Tibetan Plateau
语种	英语
来源期刊	Journal of Geophysical Research: Atmospheres
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/185968
作者单位	CMA-NJU Joint Laboratory for Climate Prediction Studies and State Key Laboratory of Severe Weather and Joint Center for Atmospheric Radar Research of CMA/NJU, School of Atmospheric Sciences, Nanjing University, Nanjing, China; Lianyungang Meteorological Bureau, Lianyungang, China; Key Laboratory of Transportation Meteorology, China Meteorological Administration, Nanjing, China; Jiangsu Institute of Meteorological Sciences, Nanjing, China
推荐引用方式 GB/T 7714	Gu C.,Huang A.,Wu Y.,et al. Effects of Subgrid Terrain Radiative Forcing on the Ability of RegCM4.1 in the Simulation of Summer Precipitation Over China[J],2020,125(12).
APA	Gu C..,Huang A..,Wu Y..,Yang B..,Mu X..,...&Cai S..(2020).Effects of Subgrid Terrain Radiative Forcing on the Ability of RegCM4.1 in the Simulation of Summer Precipitation Over China.Journal of Geophysical Research: Atmospheres,125(12).
MLA	Gu C.,et al."Effects of Subgrid Terrain Radiative Forcing on the Ability of RegCM4.1 in the Simulation of Summer Precipitation Over China".Journal of Geophysical Research: Atmospheres 125.12(2020).